METHOD AND APPARATUS FOR CONTROLLING INTER-CELL INTERFERENCE IN WIRELESS COMMUNICATION SYSTEM

• US 20140112216A1
• Filed: 06/28/2012
• Published: 04/24/2014
• Est. Priority Date: 06/29/2011
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Seo, Inkwon, Seo, Hanbyul, Kim, Kijun
• Granted Patent: US 9,319,189 B2
• Time in Patent Office: Days
• US Class Current: 370/280
• CPC Class Codes: H04J 11/005 of intercell interference
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04L 5/1469 using time-sharing

Abstract

The present invention pertains to a wireless communication system, and more particularly, to a method for transmitting an uplink (UL) signal in a time division duplex (TDD) wireless communication system and an apparatus therefor, and the method comprises the following steps: receiving information limiting UL transmission activity from a serving cell; and transmitting a UL subframe in consideration of the information, wherein signal transmission of specific time-frequency resources corresponding to the information in the UL subframe is limited.

Claims

1. A method for transmitting an uplink (UL) signal in a time division duplex (TDD) wireless communication system, the method comprising:

receiving information limiting UL transmission activation from a serving cell; and

transmitting a UL subframe based on the information,

wherein signal transmission through specific time-frequency resources corresponding to the information in the UL subframe is limited.

2. The method according to claim 1, wherein the information includes information indicating a subframe set in which UL transmission activation is limited.

3. The method according to claim 1, wherein the information includes information indicating a specific signal corresponding to the specific time-frequency resources, the specific signal corresponding to at least one of a reference signal (RS), a broadcast channel (BCH) and a synchronization channel (SCH).

4. The method according to claim 1, wherein the UL subframe includes a plurality of single carrier frequency division multiple access (SC-FDMA) symbols, signal transmission of SC-FDMA symbols corresponding to the specific time-frequency resources being limited.

5. The method according to claim 1, wherein limitation of signal transmission through the specific time-frequency resources comprises mapping UL data to all allocated time-frequency resources including the specific time-frequency resources and then puncturing the UL data in the specific time-frequency resources.

6. The method according to claim 1, wherein limitation of signal transmission through the specific time-frequency resources comprises mapping UL transmission data to time-frequency resources on the UL subframe while skipping at least the specific time-frequency resources.

7. A communication apparatus configured to transmit a UL signal in a TDD wireless communication system, comprising:

a radio frequency (RF) unit; and

a processor,

wherein the processor is configured to receive information limiting UL transmission activation from a serving cell and to transmit a UL subframe based on the information,

wherein signal transmission through specific time-frequency resources corresponding to the information in the UL subframe is limited.

8. The communication apparatus according to claim 7, wherein the information includes information indicating a subframe set in which UL transmission activation is limited.

9. The communication apparatus according to claim 7, wherein the information includes information indicating a specific signal corresponding to the specific time-frequency resources, the specific signal corresponding to at least one of an RS, BCH and SCH.

10. The communication apparatus according to claim 7, wherein the UL subframe includes a plurality of SC-FDMA symbols, signal transmission of SC-FDMA symbols corresponding to the specific time-frequency resources being limited.

11. The communication apparatus according to claim 7, wherein limitation of signal transmission through the specific time-frequency resources comprises mapping UL data to all allocated time-frequency resources including the specific time-frequency resources and then puncturing the UL data in the specific time-frequency resources.

12. The communication apparatus according to claim 7, wherein limitation of signal transmission through the specific time-frequency resources comprises mapping UL transmission data to time-frequency resources on the UL subframe while skipping at least the specific time-frequency resources.